Search for Exotic Baryons in 800 GeV pp{yields}p{xi}{sup {+-}}{pi}{sup {+-}}X Reactions
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
- Universidad de Guanajuato, 37150 Leon, Guanajuato (Mexico)
- Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
- Columbia University, Nevis Laboratory, Irvington, New York 10533 (United States)
We report the results of a high-statistics, sensitive search for narrow baryon resonances decaying to {xi}{sup -}{pi}{sup -}, {xi}{sup -}{pi}{sup +}, {xi}{sup +}{pi}{sup -}, and {xi}{sup +}{pi}{sup +}. The only resonances observed are the well known {xi}{sup 0}(1530) and {xi}{sup 0}(1530). No evidence is found for the states near 1862 MeV, previously reported by NA49 [Phys. Rev. Lett. 92, 042003 (2003)]. At the 95% confidence level, we find the upper limit for the production of a Gaussian enhancement with {sigma}=7.6 MeV in the {xi}{sup -}{pi}{sup -} effective mass spectrum to be 0.3% of the number of observed {xi}{sup 0}(1530){yields}{xi}{sup -}{pi}{sup +}. We find similarly restrictive upper limits for an enhancement at 1862 MeV in the {xi}{sup -}{pi}{sup +}, {xi}{sup +}{pi}{sup -}, and {xi}{sup +}{pi}{sup +} mass spectra.
- OSTI ID:
- 20696540
- Journal Information:
- Physical Review Letters, Vol. 95, Issue 15; Other Information: DOI: 10.1103/PhysRevLett.95.152001; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
Similar Records
Search for exotic S=-2 baryons in pp collisions at {radical}(s)=1.96 TeV
Exotic baryon searches in 800 GeV/c pp {yields} pX